Juno Perijove 17, December 21, 2018 Options

[Sean]

Enhanced sequence from Gerald's output...

[Bjorn Jonsson]

Image PJ17_21 in approximately true color/contrast versions. In terms of color and field of view these are very roughly comparable to what might be obtained with a regular consumer type camera (or even a phone). However, the resolution is a bit lower.



Enhanced versions:




Metadata:

IMAGE_TIME = 2018-12-21T16:56:30.184
MISSION_PHASE_NAME = PERIJOVE 17
PRODUCT_ID = JNCE_2018355_17C00021_V01
SPACECRAFT_ALTITUDE = 6209.8 km
SPACECRAFT_NAME = JUNO
SUB_SPACECRAFT_LATITUDE = 30.8783
SUB_SPACECRAFT_LONGITUDE = 152.7168
TITLE = PJ17 North Temperate Belt
Resolution at nadir: ~4.2 km/pixel

[jccwrt]

Here's a processed version of Gerald's draft #22, which includes a candidate moon shadow along the northern edge of the NEB at about the 1 o'clock position.

JunoCam - Perijove over the North Equatorial Belt by Justin Cowart, on Flickr

If it is a shadow it shows little visible motion (if any) against the cloud tops in the 4 minutes of observation, but a map-projected version of these images is probably necessary to double check. I haven't been able to find a way to check this hypothesis other than Jupiter Viewer - Thebe is about in the right place but there's not enough information to determine if its sub-Sun point falls on Jupiter. It could just be a lookalike cyclone core (see Machi's post in the Voyager thread)

There is a real moon shadow on the southern horizon though, which is undoubtedly Amalthea. Here's a cropped image to give it the limelight:

[Gerald]

PJ17, part 4, drafts.
It will probably take a few more hours, until I'll have completed the according reprojections, well, unless I'll fall asleep during work after midnight.

[Gerald]

Reprojections of the RGBs are online.
The timelapse sequence shows some processing artifacts near the GRS, side effects of the patching algorithm for camera artifacts and energetic particle impacts.

Here the first 10 images of part 4, starting with
#28, #29,
#30, #31:

[Gerald]

#32, #33, #34:

[Gerald]

#35, #36, and #37:

[jccwrt]

Image #40, processed from Gerald's drafts. Interesting to note that Oval BA ('Little Red Spot') is currently passing south of the GRS. Interesting to note that it shows very little coloration in this image, especially relative to previous JunoCam images where the system has a brownish core. It's especially interesting in comparison to the planning maps on the SwRI site, which appear to show a reddish Oval BA relative to the South Tropical Zone as recently as August. Definitely worth monitoring to see if a weakening trend is in progress.

[Sean]

PJ17_41 from Brian Swift output


and PJ17_40 + lightly processed


...PJ17_37 + enhanced

[Sean]

PJ17_38 after Gerald...

[Bjorn Jonsson]

Image PJ17_36 in an approximately true color/contrast version and an enhanced version. The Great Red Spot and Oval BA are prominent:



As has been mentioned above, the color of Oval BA has faded a lot recently. It's still slightly more reddish/yellowish than the whitish zones whereas in e.g. the Voyager images, the color of the three ovals that later merged to form Oval BA was very similar to the color of the zones. It seems to me that the color has now become somewhat similar to the color of Oval BA in the Cassini images of Jupiter (this needs to be checked more carefully though).

And this a reprojected version of the same image. It simulates the view of Jupiter from Earth:

[Kevin Gill]

Draft Overview of Perijove 17


Overview of Juno's Perijove 17

[ElkGroveDan]

Draft Overview of Perijove 17

Nice!

[MatthewK]

Thank you all for these stunning images - I've been mesmerised by Jupiter's beauty for 40 years and this is bringing the wonder back.

[Sean]

PJ17 Oval BA animation


Made with 9 frame reprojection by Gerald